The more than 1.35 billion people who use Facebook on an ongoing basis rely on a seamless, “always on” site performance. On the back end, we have many advanced sub-systems and infrastructures in place...

L20n is a new localization framework developed by Mozilla for the Web. It allows localizers to put small bits of logic into localization resources to codify the grammar of the language. L20n’s framework removes...

. This model offers higher-availability, resiliency to failure and loose coupling. The downside to such an architecture is the potential for a latent user experience. Every time a customer loads up a homepage or...